[gtk+] (8 commits) Non-fast-forward update to branch wip/ebassi/gl-context-realize

[Emmanuele Bassi <ebassi src gnome org>]

The branch 'wip/ebassi/gl-context-realize' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  b59018e... Switch GDK_GL_PROFILE_DEFAULT to mean 3_2_CORE
  92b2a4f... gl: Move getters for context options to the public API
  277d65d... gl: Drop OpenGL legacy profile
  ab4d886... gl: Do not use the extension API for core GL
  3d6617d... glarea: Do not use extension API
  8766bcc... gl: Add more debugging notes
  8f563ba... tests: Update testglarea
  078aae0... demos: Update the GtkGLArea demo code
  facb268... GDK-Win32: Drop Win32-specific ->upload_texture()
  6a151e3... gdkglcontext-win32.h: Clean Up a Bit

Commits added to the branch:

  4bf387e... Switch GDK_GL_PROFILE_DEFAULT to mean 3_2_CORE
  bd26ebd... gl: Move getters for context options to the public API
  8846a70... gl: Drop OpenGL legacy profile
  3ff6a71... gl: Do not use the extension API for core GL
  cfdfa1c... glarea: Do not use extension API
  d9ecc88... gl: Add more debugging notes
  ab7d8c3... tests: Update testglarea
  1102d04... demos: Update the GtkGLArea demo code